Reversing Assembly for Office Chair Armrest

ABSTRACT

A reversing assembly for an office chair armrest is provided. Therein, an armrest is provided atop with a positioning element, so that the armrest, by combination of a fastening element and the positioning element, is pivotally positioned between the fastening element and the positioning element. The armrest is provided with a ball to be resiliently laid into one of positioning holes formed on the positioning element. Thereby, the armrest, when posed forward, is allowed to swing in both directions in a predetermined range, and the armrest is also allowed to rotate 180 degrees so that the reversed armrest is absent to touch the desk-top, and thereby the seat and legs of the chair can be received under the desk-top.

BACKGROUND OF THE INVENTION

1. Technical Field

The present invention relates to office chair armrests, and moreparticularly to a reversing assembly for an office chair armrest. Itallows an armrest to not only be adjusted by rotating to differentangles but also be rotated backward and positioned at a reversedposition, so as for the armrest not to hinder the seat of the chair withthe armrest from being stored under a desk-top.

2. Description of Related Art

While many armrests for office chairs are immovably fixed, some of themare allowed with height adjustment, forward and backward shift andlimited swing so that users of different heights can have their armsbest and comfortably supported in virtue of the adjustability of thesearmrests.

However, in the conventional design, no matter the height the armrestsare positioned, the armrests always touch a desk-top whereunder the seatof the chair otherwise to be stored. Consequently, the chair hinderedfrom being properly stored under the table can obstruct traffic in aspace having it and cause the space to look cluttered.

SUMMARY OF THE INVENTION

For improving the problem of the conventional chair caused by thearmrests that hinders the seat of the chair from being stored under adesk-top, the present invention provides a reversing assembly for anoffice chair armrest allowing the armrest of a chair with reversion soas to clear of obstruction look in a clutter above the seat, therebyallowing the seat to be stored under the desk-top.

In order to solve the technical problem, the present invention adoptsthe technical scheme as below. A positioning element is provided atop anarmrest mount, and an armrest is positioned by combination of afastening element and the positioning element, so that the armrest ispivotally positioned between the fastening element and the positioningelement. Meantime, the armrest is provided with a ball to be resilientlyreceived in one of positioning holes formed at predetermined sites onthe positioning element.

Hence, in virtue of the forgoing structure of the present invention, thearmrest, when posed forward, is allowed to swing in both directions in apredetermined range, and the armrest is also allowed to rotate 180degrees so that the reversed armrest is absent to touch the desk-top,and thereby the seat and legs of the chair can be received under thedesk-top, leaving the space roomier and cleaner.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention as well as a preferred mode of use, further objectives andadvantages thereof will be best understood by reference to the followingdetailed description of an illustrative embodiment when acquire inconjunction with the accompanying drawings, wherein:

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic exploded view of an armrest of the presentinvention;

FIG. 3 is another schematic exploded view of the armrest of the presentinvention;

FIG. 4 is a schematic lateral sectional view of the armrest of thepresent invention;

FIG. 5 is an enlarged view of Part A of FIG. 4;

FIG. 6 is a top view of the armrest of the present invention showing thearmrest swinging;

FIG. 7 is a schematic lateral sectional view of the armrest of thepresent invention showing the armrest reversed; and

FIG. 8 is an enlarged view of Part B of FIG. 7.

DETAILED DESCRIPTION OF THE INVENTION

Referring to FIGS. 1 through 5, in the present invention, a pair ofarmrest mounts 1 is provided at two laterals of an office chair. On eachof the armrest mounts 1, an armrest 2 assembled with an armrest cover 23is mounted. A positioning element 3 is arranged atop the armrest mount 1and has centrally a projecting pivot 31. Around the positioning element3, a turning space 32 of a predetermined range is provided and there aretwo retaining portions 33, 34 arranged at two opposite ends of theturning space 32. At a place slightly outer than where the armrest 2 andthe armrest mount 1 are coupled, an abutting portion 21 is provided tobe projecting into the turning space 32. A pivot hole 20 allowing thepivot 31 to pass is formed at a center of an area where the armrest 2and the armrest mount 1 are coupled, so that the pivot 31 passingthrough the pivot hole 20 is coupled with a fastening element 4, therebypositioning the armrest 2 between the positioning element 3 and thefastening element 4, and allowing the armrest 2 to rotate against thepivot 31.

Moreover, the fastening element 4 has positioning holes 40 formed atfront and rear sides of a lower surface thereof Meantime, the armrest 2,at a place corresponding to the fastening element 4, is formed with ablind hole 22. The blind hole 22 receives successively a spring 5 and aball 6. Since the spring 5 normally props up the ball 6, the ball 6 canresiliently engage with any of the positioning holes 40, therebypositioning the armrest 2 that is posed at a desired angle.

Thereby, referring to FIG. 6 as well, when posed forward for normal use,the armrest 2 is allowed to swing inward or outward and then the ball 6can be received in different positioning holes 40 to position thearmrest 2 at an forward, yet, inward or outward bias position. When thearmrest 2 rotates inward, the abutting portion 21 will eventually abutsagainst the retaining portion 33 of the positioning element 3 and stopsthe armrest 2 further inward rotation. On the other hand, when thearmrest 2 rotates outward 180 degrees, the abutting portion 21 can alsoabut against the retaining portion 34 of the positioning element 3 whilethe ball 6 can be received in the positioning hole 40 at the rear sideof the fastening element 4. Then, as shown in FIGS. 7 and 8, thereversed armrest 2 is absent from the space above the seat of the chair,so that the seat and legs of the chair can be received under thedesk-top, leaving the space where the chair is in roomier and cleaner.

1. A reversing assembly for an office chair armrest, the armrest beingpivotally mounted on an armrest mount, wherein: the armrest mount isprovided atop with a positioning element, which is centrally providedwith a projecting pivot, and a fastening element having a lower surfaceformed with a plurality of positioning holes at two opposite sides isfixed to the pivot; and the armrest is assembled to the pivot of thepositioning element and located between the fastening element, and thefastening element has a ball to be resiliently received in one of thepositioning holes formed on the fastening element.
 2. The reversingassembly of claim 1, wherein the armrest has a lower surface formed witha raised abutting portion and the positioning element is circled by aturning space of a predetermined range, while the turning space has tworetaining portions formed on opposite ends thereof so that the abuttingportion of the armrest is allowed to move along the turning space untilretained and positioned by one of the retaining portions.